Alert archive / Minnesota / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 92, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 29, 2001, 8:29 PM CDT for Grant County, Minnesota. It was in force for 31 min. 1 report came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- Jun 29, 2001, 8:29 PM CDT (01:29 UTC)
- Expired
- Jun 29, 2001, 9:00 PM CDT
- In force
- 31 min
- Issued by
- NWS Grand Forks, ND
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Grant County, MN
The radar
The Fargo/Grand Forks radar (KMVX), 202 km from the middle of the area, began a volume at 01:33 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 29, 9:02 PM CDT | Hail 0.75 | Evansville, MN |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 1.5 hours before the alert went out and 217 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1235 J/kg
- Mixed-layer CIN
- -52 J/kg
- Mixed-layer LCL
- 1556 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KFGF 300129 SVRFAR MNC051-300200- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS 829 PM CDT FRI JUN 29 2001 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN GRANT COUNTY IN WEST CENTRAL MINNESOTA... * UNTIL 900 PM CDT * AT 827 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER ASHBY...OR ABOUT 17 MILES SOUTHEAST OF FERGUS FALLS...MOVEMENT WAS TO THE SOUTHEAST AT 15 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... ERDAHL AT 850 PM CDT... REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. LAT...LON 4611 9579 4610 9594 4594 9586 4597 9561 $$ NNNN
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 29, 2:10 PM CDT, 6 hours 19 minutes earlier.
Area forecast discussion, Jun 29, 2:10 PM CDT, 6 hours 19 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 210 PM CDT FRI JUN 29 2001 FORECAST CHALLENGE WILL BE TEMPS AND PRECIP CHANCES .OVERVIEW... LATEST SFC ANALYSIS SHOWS WEAK FRONT/TROUGH PUSHING EAST INTO MN SIDE OF FA. SLIGHT DEWPOINT COOLING IS NOTED BEHIND FEATURE...AS THEY DROP INTO THE LOWER 60S. ETA DID A BIT BETTER JOB INITIALIZING MASS FIELDS...WITH AVN NOT TOO FAR BEHIND. .SHORT TERM... CONCERN THIS EVENING IS CONVECTIVE POTENTIAL IN EASTERN FA. TROUGH IS PROGRESSING A LITTLE FASTER THAN MODELS HAVE PROGGED. THIS SHOULD LIMIT SFC CONVERGENCE AS A WEST/NORTHWEST FLOW DEVELOPS AND TROUGH AND DEVELOPING CONVECTION MAKES IT OUT OF FA AROUND 21Z. EVEN THOUGH A 50KT SPEED MAX WILL RIDE INTO AREA AFTER 00Z...FEEL ANY SFC FORCING WILL BE LOST WITH TROUGH PASSAGE. IN ADDITION...850MB DEWPOINTS DRY TO AROUND +9C THIS EVENING. INSTABILITIES ALSO DROP AFTER 00Z...SO EXPECT A DRY EVENING AND OVERNIGHT. WINDS WILL BECOME LIGHT NORTH AFTER 06Z...COUPLED WITH RESIDUAL MOISTURE COULD LEAD TO PATCHY FOG...ESPECIALLY IN SOUTH AND EAST WHERE HIGHER DEWPOINTS WILL BE. WILL MENTION FOG IN HERE FOR THIS REASON. .LONG TERM... SIGNIFICANT COLD FRONT DROPS INTO REGION TOMORROW FROM NORTH. 850MB TEMPS COOL TO AROUND +6C ACROSS THE NORTH...WITH THE SOUTH MUCH WARMER AT +14C. WITH THE PASSAGE OF FRONT...AND RIGHT ENTRANCE REGION OF 110KT 300MB SPEED MAX...EXPECT SCATTERED SHOWERS ACROSS NORTH WHERE INSTABILITY WILL BE LIMITED. EXPECT PLENTY OF CLOUDS AS WELL WITH CONVECTIVE TEMPS IN THE MID 60S...ANY SUNSHINE SHOULD SELF DESTRUCT. FROM GFK SOUTH...CAPES AROUND 600 J/KG WITH LI/S TO -4C WILL PREVAIL AFTER 18Z. IN ADDITION...SFC DEWPOINTS WILL BE AROUND 60F WITH 850MB DEWPOINTS POOLING AHEAD OF FRONT AROUND +10C. EXPECT THUNDERSTORM DEVELOPMENT ALONG GOOD SFC CONVERGENCE NEAR FRONT BY AFTERNOON. WITH WET BULB ZERO LEVELS DROPPING TO 9500FT...WOULD NOT RULE OUT SOME ISOLATED SEVERE STORMS WITH LARGE HAIL. WEAK SUBSIDENCE WILL BUILD IN SAT NIGHT BEHIND DEPARTING SHORTWAVE PASSING NORTH OF BORDER. RELATIVE HUMIDITY PROGS SHOW DRIER AIR WORKING INTO NORTHERN FA AS HIGH CONTINUES TO BUILD INTO ARROWHEAD. 850MB TEMPS ALSO DROP TO AROUND +2C IN NORTH...SO EXPECT TEMPS BELOW NORMAL. TO THE SOUTH...FRONT WILL LINGER IN SOUTH DAKOTA AND EXPECT MORE CLOUDS CLOSER TO RETURN FLOW. ON SUNDAY...LOW LEVEL JET DEVELOPS IN WESTERN NORTH DAKOTA. SHOWALTER/S DROP TO AROUND -2C IN WESTERN FA BY 00Z MON. STRONG 850MB WARM AIR ADVECTION MOVES INTO THE RED RIVER VALLEY SUNDAY AFTERNOON. IN ADDITION...STRONG LIFT IN THE 850-700MB LAYER RESULTS AHEAD OF 500MB SHORTWAVE WHICH SHOULD AID ELEVATED CONVECTION. EXPECT SHOWERS BY LATE IN THE DAY SUNDAY IN EASTERN FA...WHERE STABLE AIR WILL HANG ON ALL DAY. TEMPS WILL BE COOLEST IN THE NORTHEAST...CLOSER TO DEPARTING HIGH. EXTENDED...LONG RANGE MODELS IN PRETTY GOOD AGREEMENT...WITH MRF TIMING COMPROMISE...SO UTILIZED FOR FORECAST. UPPER LEVEL NW FLOW DOMINATES THROUGH EXTENDED WITH A SHORTWAVE AND SFC FRONT MOVING THROUGH CWFA ON MON...SO KEPT CHC TSRA. UPPER LEVEL LOW AND ASSOCIATED TROF MOVE THROUGH CWFA TUE NIGHT THROUGH WED...KEEPING CYCLONIC FLOW OVER CWFA ON WED...SO ADDED CHC TSRA TO FORECAST. SFC HIGH THEN BUILDS IN FOR THU AND FRI...SO KEPT DRY. AS FAR AS TEMPS...FMR AND MEX SIMILAR...KEEPING TEMPS IN NORMAL TO SLIGHTLY BELOW NORMAL RANGE. .FGF...NONE. KELLENBENZ/NG
In the hours before
Local storm report, Jun 29, 8:26 PM CDT, 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
826 PM CDT FRI JUN 29 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0710 PM 5 W AMOR MN 90 MPH TSTM GUST
06/29/01 OTTER TAIL ESTIMATED REPORT BLEW
SHINGLES OFF THE ROOF AND
BLEW A 8X8 FT FISH HOUSE
150 YARDS
0715 PM 4 NW AMOR MN 1 INCH HAIL
06/29/01 OTTER TAIL
0721 PM 2 W AMOR MN .75 INCH HAIL
06/29/01 OTTER TAIL
0803 PM 7 SW BATTLE LAKE MN .88 INCH HAIL
06/29/01 OTTER TAIL HAIL OF VARYING SIZE FELL
FOR OVER 20 MINUTESThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 7:17 PM CDT | Severe Thunderstorm Warning | FGF | Otter Tail | 43 min |
| Jun 29, 7:58 PM CDT | Severe Thunderstorm Warning | FGF | Otter Tail | 47 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2001Every severe thunderstorm warning in 2001
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.